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| author |   Shivasharan S <shivasharan.srikanteshwara@broadcom.com> | 2018-01-05 05:27:46 -0800 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2018-01-10 23:25:18 -0500 |
| commit | 88d155c61acd3fb852c0a20be2d840f0765cae7c (patch) | |
| tree | e6ad07be6e6adcba2705d0ba21c7b6c8c08d04c7 /drivers/scsi/megaraid/megaraid_sas_base.c | |
| parent | scsi: megaraid_sas: Selectively apply stream detection based on IO type (diff) | |
| download | linux-dev-88d155c61acd3fb852c0a20be2d840f0765cae7c.tar.xz linux-dev-88d155c61acd3fb852c0a20be2d840f0765cae7c.zip | |
scsi: megaraid_sas: Expose fw_cmds_outstanding through sysfs
Expose FW outstanding commands (fw_outstanding) through sysfs interface.
This helps in debugging certain performance issues in the field.
Signed-off-by: Sasikumar Chandrasekaran <sasikumar.pc@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_base.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 6da2766694cb..40775408c222 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -3122,6 +3122,16 @@ megasas_ldio_outstanding_show(struct device *cdev, struct device_attribute *attr return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&instance->ldio_outstanding)); } +static ssize_t +megasas_fw_cmds_outstanding_show(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(cdev); + struct megasas_instance *instance = (struct megasas_instance *)shost->hostdata; + + return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&instance->fw_outstanding)); +} + static DEVICE_ATTR(fw_crash_buffer, S_IRUGO | S_IWUSR, megasas_fw_crash_buffer_show, megasas_fw_crash_buffer_store); static DEVICE_ATTR(fw_crash_buffer_size, S_IRUGO, @@ -3132,6 +3142,8 @@ static DEVICE_ATTR(page_size, S_IRUGO, megasas_page_size_show, NULL); static DEVICE_ATTR(ldio_outstanding, S_IRUGO, megasas_ldio_outstanding_show, NULL); +static DEVICE_ATTR(fw_cmds_outstanding, S_IRUGO, + megasas_fw_cmds_outstanding_show, NULL); struct device_attribute *megaraid_host_attrs[] = { &dev_attr_fw_crash_buffer_size, @@ -3139,6 +3151,7 @@ struct device_attribute *megaraid_host_attrs[] = { &dev_attr_fw_crash_state, &dev_attr_page_size, &dev_attr_ldio_outstanding, + &dev_attr_fw_cmds_outstanding, NULL, }; |